Hello,
Your reCAPTCHA classic key will automatically be migrated when it becomes eligible. This means that we will create a new Google Cloud project for you and migrate the key there. You will receive an email when this happens. If you would like to control which project the key becomes associated with, you can migrate it manually following these instructions.
You do not have to change your integration once the key is migrated. It should continue working on your site as it does now.
There is no fee for migrating the key, however, your monthly usage may qualify for reCAPTCHA Standard or Enterprise. You will only be charged once you have reached 10,000 assessments each month. Any usage below this amount will remain free. If you have not set up billing on the Google Cloud project, you will receive an email at 10,000 assessments notifying you that your free assessments for the month have been used up and you will not receive reCAPTCHA scores for that key until the next month unless you enable billing.
The email you received should include your average usage for the past 3 months. You can input that number into this pricing calculator to get an idea of how much you will pay monthly if your usage stays the same. For more details on the different pricing tiers, please see our pricing table.
You can read more about how reCAPTCHA billing works here.
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